Valve mechanism.



L. S. GHADWICK.

VALVE MEGHANISM.

APrLxuATIoN FILED Mmm. 1907.

Patented Aug. 22, 1911.

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VALVE MBGHANISM.

APPLICATION FILED MMM, 1907.

Patented Aug. 22, 1911.

L.' S. CHADWICK. VALVE MEGHANISM. APPLICATIQN rlLBD'HAR. 9. 1907.

Patented Aug. 22, 1911.

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L. S. GHADWICK.

VALVE MBGHANISM.

APPLICATION FILED MAR. o, 1907.

Patented Aug. 22, 1911.

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hllTD Ttililtii PATENT FFlCE.

LEE S. CHADWICK, 0F PHILADELPHIA, PENNSYLVANIA.

VALVE MEGHANISM.

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To all whom it may concern:

Be it known that l, lam S. Cimnwrck, a citizen oit the United States,residingin Philadelphia, Pennsylvania, have invented certainImprovements in Valve l lcchanisni7 of which the 'hillmving is asjjiccitieaftion.

My invention relates to earburcters :tor 'internal con'll'aistionengines, and the Yobject o't my invention is to regulate the amount otgasolene discharged into the mixingr chamber when the throttle valve isopen; the throttle valve and gasolene valve mechanism being combined insuch manner that the discharge oit gasolene is in direct proportion toVthe extent of opening,` et said throttle valve.

My invention is fully shown in the aecompanying drawings, in which:

Figure l, is a plan view o't sullicient ot' the mechanism of an internalcombustion envgine, shown in this instance as carried by an automobile,to illustrate my invention; Fie'. 2, is a side elevation ct the same;Fifgj. il, is a plan view showing.;l the adjusting and rep;- ulatingmechanism forming` the subject o't my invention, in the position whenthe ensolene and throttle valves are open; Fin'. ft, is a sectional viewof the `rasolene tank showing the valve controlling the delivery otgasolene and the throttle valve, taken on the line n-m Fire'. f3; Fig.5, is a plan view similar to Fig. S, showing the position oi the partsot the adj listing; and rele'ulatincY mechanism when the valves areclosed; Fie'. G, is a sectional view similar to Fig. 4t, with the valvesclosed; Fig. 7, is a plan view similar to Figs. 3 and 5, illustrating amodified form of the controlling' devices, and Fig. 8, is a viewsomewhat similar to the upper part of Figs. t and G, showing inelevation the parts ot the adjusting and regulating 1nechanismillustrated in Fig'. 7.

As is well known, it is the common practice to combine the mechanismiter operating the valve controlling' the disclmrge of gasolene with themechanism for operating the throttle valve, so that as said throttlevalve is opened the gasolene valve will also open and grasolene will beadmitted to the mixing chamber in direct proportion to lthe open ing otsaid throttle valve. and this arraneement is such that when the throttlevalve is closed, the `gnsolene valve will be partly or fully closed, andwhen the throttle valve is fully opened the gasolene valve will be inthe same position. It often happens,

Specification of Letters Patent.

Application led March 9, 1907.

Patented Aug. 22, 1911.

Serial No. 361,430.

however, that the character ot the `e'aselene or the type ot engine withwhich such carburetcr is to be combined is not the same in everyinstance and it becomes desirable to be able to change the relation olithe openini;l of the 4nasolenc valve o't such earhuretcr relatively tothe opening ot the throttle valve oil the engine, and the readyaecomplislunent of such action the purpose of my invention.

ln the drawings herewith, l represents a throttle Yalve having: a stem2, and B the gasolcne valve having,Y a stem fi, which latter passesthrough the stem ot' thc throttle valve. 'lhe lower end ot' the steincarrying' the gasolene `valve is threaded, the pitch of said threadsbeiney such that the limited 1novement oil the stem will serve to openthe valve sufficiently. The stem oil" said throttle valve has an arm 5to which a, link 6 is attached; said link being' connected at its outercud to a hell-crank 7, pivoted at S and having;- operating` means suchas the foot treadle t). or it may be connected to any other form oi.lever 'l'or actuation in any suitable manner.

'.lhc stem fl, ci the gasolene valve is pro vided with an arm 10,apertured for a purpose to be hereinafter described, and this arm isconnected by means of a threaded rod l1 with a link 12; thc latter beingconnected with a threaded rod lf3 carried by thc arm 5, by means oit alink 111-, which in some instances may be curved as shown. The link l2is connected at its outer end 1 5 with an arm lt. to which a verticalspin die 17 is connected, and having a controlling lever 18 foroperating the same. such lever carryinf,r means whereby it may be lockedto a segmental plate 19 when once adjusted. rlhis adjustment is usuallymade when testirngr out the engine prcpart'ory to sale or otherdisposition and is rarely changed except tor climatic conditions. Afurther adjustment, however. may he necessary with different l(grades otgasolene. and it will be umilerstood. ot' course` that the adjustment olthe valve controlling' or regulating` mechanism will dill'cr in all.engines.

ln the adjustment ot the mechanism 'forming' the subject ot myinvention, the character oi" the `rasolene and the required amount to beemployed in the operation of the engine under consideration is tested,and the position of the link 1Q is adjusted A by means of the threadedrod l1 with reit'- erence to its connection with the bar 10; the latterbeing apertured at 21 to permit engagement of the end of the rod 11therewith whereby the proper relation between the opening of thegasolene valve and the throttle valve may be established. The bar 10 hasbeen previously adjusted in r-elation to the valve stem 4 to directlyregulate the opening of the gasolene valve, and then held by a bolt 22passing through the split end 28 of the same. vWhen this has beendetermined, the controlling lever 18 is fixed and the mechanism is readyfor operation. The operator is thus assured that the gasolene valve willopen sutliciently to discharge the proper amount of gasolene for anydegree of opening of the throttle valve. Upon actuating the foot-lever9, or other lever or means properly connected to the link 6, thethrottle valve will be directly opened through the medium of the arm 5to which said link is pivotally connected. At the same time the gasolenevalve will be Opened, and such opening of the latter valve isaccomplished in the following manner: As the arm 5 connected to the stem2 of the throttle valve is being moved by the link 6 to open said valve,it serves to move the link 12 through the medium of the rod 1,8 and link14; such movement of the link k12 being in a slightly lateral direction,or, more properly speaking, in the arc of a circle struck from thecenter of the pivotal connection of said link 12 with the arm 16. Thismovement of the link 12 causes it to actuate the bar 10, connected tothe stem 4 of the gasolene valve, through the medium of the link 11, andthereby open said gasolene valve simultaneously with the opening of thethrottle valve.

In addition to the lateral or oscillatory movement of the link 12 fromits pivotal connection with the arm 16, it may be moved longitudinallyfor the purpose of adjusting the extent to which the gasolene valve willopen with respect to the extent of opening of the throttle valve, byoperating the lever 18. rIhis adjustment when once made, however, rarelyrequires change, and the movement of the link 12 in making suchadjustment has nothing whatever to do with the subsequent movement ofsaid link through the means described for the purpose of operating thegasolene valve with respect to the throttle valve during the running ofthe engine. By reason of this corelation of the valves, the opening ofthe gasolene valve is always in the desired proportion with respect tothe opening of the throttle valve. The throttle valve also may beprovided with a shutter valve 24, to regulate the supply of air admittedto the mixing chamber.

In Figs. 7 and 8, I have shown a simplited form of the adjustingmechanism forming the subject of my invention, in which I employ athreaded stem 10;1 (in lieu of the bar 10,) and movable upon which is athreaded sleeve 25, to which an arm 11a, (taking the place of the rod11,) is pivotally connected. Although this construction involves thesame idea as that shown in Figs. 3, 4, 5 and 6, it will be observed thatthe particular construction enables me to eect a much easier and lineradjustment of the extent of opening of the valves. In this constructiontoo, it will be noted that the arm 13a, (corresponding to the arm 13, asshown in Figs 3, 4, 5 and 6,) has a iixed pivotal connection for t-hearm 14a, (corresponding to the arm 14 of the other structures). The arm14a is pivotally connected to the link 12, and the pin forming suchconnection carries a threaded sleeve 26 in which the rod 11a isadjustable; the end of the latter' being bent for engagement with t-hesleeve 25.

In the preparatory setting of this device, it is only necessary tooperate the threaded sleeve 25, the necessary adjustment of the rod 11awith respect thereto being accomplished by movement of the sleeve 26 onsaid rod, which carries the pivot pin for the rod 14a and link 12. Inall other respects the operation of this mechanism and the resultaccomplished is precisely similar t-o that of the structure shown inFigs. 1 to 6, inclusive.

I claim: A

1. In val've mechanism for internal combustion engines, the combinationof a throttle valve, a gasolene valve, means for coupling said valveswhereby the movement of one directly controls the movement of the other,and mechanism for setting or regulating the extent of opening of saidvalves relatively to each other, said mechanism comprising an armconnected to one of said valves, connected links extending from saidarm, a second arm to which one of said links is attached, a shaftcarrying said latter arm, a handle for moving said shaft, and means forlocking said handle.

2. In valve mechanism for internal combustion engines, the combinationof a throttle valve, a vgasolene valve, means for coupling said valveswhereby the movement of one directly controls the movement of the other,and mechanism for setting or regulating the extentof opening of thegasolene valve relatively to the throttle valve, said mechanismcomprising an arm connected to one of said valves, connected linksextending from said arm, a second arm to which one of said links isattached, a shaft carrying said latter arm, a handle for moving saidshaft, and means for locking said handle.

3. In valve mechanism for internal combustion engines, the combinationof a ISU throttle valve, a gasolene valve, each rotatably movable to theopen or closed positions on the same axis, adjustable means for couplingsaid valves whereby the movement of one will effect movement of theother, and means operable independently of the adjustable coupling meansfor setting or regulating the extent of opening of the gasolene valverelatively to the throttle valve. 'i

4L. In valve mechanism for internal combustion engines, the combinationof a throttle valve, a gasolene valve, each rotatably movable to theopen or closed position on the same axis, adjustable means for couplingsaid valves whereby the movement of one will effect movement of theother, and means operable independently of the adjustable coupling meansfor setting or regulating the extent of opening of the gasolene valverelatively to the throttle valve.

5. In valve mechanism for internal combustion engines, the combinationof a throttle valve, a gasolene valve, each Inovable to the open orclosed position on the same axis, adjustable means for coupling saidvalves whereby the movement of one valve controls the operation of theother, and means for setting or regulating the extent of opening of thegasolene valve relatively to the throttle valve, including a lever, andlocking mechanism for said lever.

6. In valve mechanism for internal combustion engines, the combinationof a throttle valve, a gasolene valve, stems for said valves rotatablymovable on the same axis, arms carried by said stems, an adjustableconnection for said arms whereby the movement of one valve will effectthe operation of the other, and means connected to sald adjustableconnection and ope 'able independently thereof for setting or regulatingthe extent of opening of the gasolene valve relatively to the throttlevalve.

7. In valve mechanism for internal combustion engines, the combinationof a throttle valve, a gasolene valve, each movable to the open orclosed position on the same axis, means for coupling said valves wherebythe movement of one valve directly controls the movement of the other,mechanisni for setting the extent of opening of the gasolene valverelatively to the extent of opening of the throttle valve, saidmeehanism comprising an arm connected to one of said valves, connectedlinks extending from said arm, a second arm to which one of said linksis attached, a shaft carrying said latter arm, a handle for moving saidshaft, and means for locking said handle.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

LEE S. CIIADIVICK.

Witnesses:

MURRAY C. BOYER, J os. I'I. KLEIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

